A fault had developed in the complex mechanism that operated its doors.

Each of these elements was hand-crafted, and a complex mechanism was created that would peel back the egg's shell and rotate its dollhouse-like interior.

Moreover, the realization that most metamorphic belts are not the product of a single geothermal gradient indicates a more complex mechanism.

The authors note that learning to read involves a complex mechanism involving many parts of the human brain.

This particular protein domain helps the pili to form, via a complex mechanism named the chaperone/usher pathway.